package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * TODO
 *
 * @author wxc
 * @date 2023/8/18 16:40
 */
@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
  @Autowired private OrderMapper orderMapper;

  @Autowired private UserMapper userMapper;
  @Autowired private WorkspaceService workspaceService;

  /**
   * 根据时间区间统计营业额
   *
   * @param begin
   * @param end
   * @return
   */
  public TurnoverReportVO getTurnover(LocalDate begin, LocalDate end) {
    ArrayList<LocalDate> dateList = new ArrayList<>();
    dateList.add(begin);

    while (!begin.equals(end)) {
      begin = begin.plusDays(1); // 日期计算，获得指定日期后1天的日期
      dateList.add(begin);
    }

    List<Double> turnoverList = new ArrayList<>();
    for (LocalDate date : dateList) {
      // select sum(amount) from where order_time >?and order_time<?and status=5
      LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
      LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

      Map map = new HashMap<>();
      map.put("status", Orders.COMPLETED);
      map.put("begin", beginTime);
      map.put("end", endTime);

      Double turnover = orderMapper.sumByMap(map);
      // 如果没有营业额
      turnover = turnover == null ? 0.0 : turnover;

      turnoverList.add(turnover);
    }

    return TurnoverReportVO.builder()
        .dateList(StringUtils.join(dateList, ","))
        .turnoverList(StringUtils.join(turnoverList, ","))
        .build();
  }

  /**
   * 根据时间区间统计用户数量
   *
   * @param begin
   * @param end
   * @return
   */
  public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
    List<LocalDate> dateList = new ArrayList<>();
    dateList.add(begin);

    while (!begin.equals(end)) {
      begin = begin.plusDays(1);
      dateList.add(begin);
    }
    List<Integer> newUserList = new ArrayList<>(); // 新增用户数
    List<Integer> totalUserList = new ArrayList<>(); // 总用户数

    for (LocalDate date : dateList) {
      LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
      LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
      // 新增用户数量 select count(id) from user where create_time > ? and create_time < ?
      Integer newUser = getUserCount(beginTime, endTime);
      // 总用户数量 select count(id) from user where  create_time < ?
      Integer totalUser = getUserCount(null, endTime);

      /*
      Map map = new HashMap();
      map.put("end", endTime);
      //总的
      Integer totaluser = userMapper.countByMap(map);
      map.put("begin",beginTime);
      //新增
      Integer newuser = userMapper.countByMap(map);
      */

      newUserList.add(newUser);
      totalUserList.add(totalUser);
    }

    return UserReportVO.builder()
        .dateList(StringUtils.join(dateList, ","))
        .newUserList(StringUtils.join(newUserList, ","))
        .totalUserList(StringUtils.join(totalUserList, ","))
        .build();
  }

  /**
   * 根据时间区间统计订单数量
   *
   * @param begin
   * @param end
   * @return
   */
  public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
    List<LocalDate> dateList = new ArrayList<>();
    dateList.add(begin);

    while (!begin.equals(end)) {
      begin = begin.plusDays(1);
      dateList.add(begin);
    }
    // 每天订单总数集合
    List<Integer> orderCountList = new ArrayList<>();
    // 每天有效订单数集合
    List<Integer> validOrderCountList = new ArrayList<>();
    for (LocalDate date : dateList) {
      LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
      LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
      // 查询每天的总订单数 select count(id) from orders where order_time > ? and order_time < ?
      Integer orderCount = getOrderCount(beginTime, endTime, null);
      // 查询每天的有效订单数 select count(id) from orders where order_time > ? and order_time < ? and status
      // =
      Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

      orderCountList.add(orderCount);
      validOrderCountList.add(validOrderCount);
    }

    // 时间区间内的总订单数
    Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
    // 时间区间内的总有效订单数
    Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
    // 订单完成率
    Double orderCompletionRate = 0.0;
    if (totalOrderCount != 0) {
      orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
    }

    return OrderReportVO.builder()
        .dateList(StringUtils.join(dateList, ","))
        .orderCountList(StringUtils.join(orderCountList, ","))
        .validOrderCountList(StringUtils.join(validOrderCountList, ","))
        .totalOrderCount(totalOrderCount)
        .validOrderCount(validOrderCount)
        .orderCompletionRate(orderCompletionRate)
        .build();
  }

  /**
   * 查询指定时间区间内的销量排名top10
   *
   * @param begin
   * @param end
   * @return
   */
  public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
    LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
    LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

    List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

    // String nameList =
    // StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()),",");
    // String numberList =
    // StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()),",");

    List<String> names =
        salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());

    String nameList = StringUtils.join(names, ",");

    List<Integer> numbers =
        salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
    String numberList = StringUtils.join(numbers, ",");

    return SalesTop10ReportVO.builder().nameList(nameList).numberList(numberList).build();
  }

  /**
   * 导出运营数据报表
   *
   * @param response
   */
  @Override
  public void exportBusinessData(HttpServletResponse response) {
    // 导出近30天的运营数据报表
    LocalDate begin = LocalDate.now().minusDays(30);//从今天开始向前30天
    LocalDate end = LocalDate.now().minusDays(1);
    // 查询概览运营数据，提供给Excel模板文件
    BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(begin, LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));

    InputStream in = this.getClass().getClassLoader().getResourceAsStream("template\\运营数据报表模板.xlsx");

    try {
      // 基于提供好的模板文件创建一个新的Excel表格对象
      XSSFWorkbook excel = new XSSFWorkbook(in);
      //获取sheet页
      XSSFSheet sheet = excel.getSheet("sheet1");

      //填充数据
      sheet.getRow(1).getCell(1).setCellValue("时间:"+ begin +"至"+end);

      XSSFRow row = sheet.getRow(3);
      row.getCell(2).setCellValue(businessDataVO.getTurnover());
      row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
      row.getCell(6).setCellValue(businessDataVO.getNewUsers());

      row = sheet.getRow(4);
      row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
      row.getCell(4).setCellValue(businessDataVO.getUnitPrice());
      // 通过输出流将文件下载到客户端浏览器中
      ServletOutputStream out = response.getOutputStream();
      excel.write(out);

      // 准备明细数据
      for (int i = 0; i < 30; i++) {
        LocalDate date = begin.plusDays(i);
        //准备明细数据
        businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
        row = sheet.getRow(7 + i);
        row.getCell(1).setCellValue(date.toString());
        row.getCell(2).setCellValue(businessDataVO.getTurnover());
        row.getCell(3).setCellValue(businessDataVO.getValidOrderCount());
        row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
        row.getCell(5).setCellValue(businessDataVO.getUnitPrice());
        row.getCell(6).setCellValue(businessDataVO.getNewUsers());
      }
      // 关闭资源
      out.flush();
      out.close();
      excel.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

  /**
   * 根据时间区间统计用户数量
   *
   * @param beginTime
   * @param endTime
   * @return
   */
  private Integer getUserCount(LocalDateTime beginTime, LocalDateTime endTime) {
    Map map = new HashMap();
    map.put("begin", beginTime);
    map.put("end", endTime);
    return userMapper.countByMap(map);
  }

  /**
   * 根据时间区间统计指定状态的订单数量
   *
   * @param beginTime
   * @param endTime
   * @param status
   * @return
   */
  private Integer getOrderCount(LocalDateTime beginTime, LocalDateTime endTime, Integer status) {
    Map map = new HashMap();
    map.put("status", status);
    map.put("begin", beginTime);
    map.put("end", endTime);
    return orderMapper.countByMap(map);
  }
}
